Parse and pretty-print a JSON string with configurable indentation. Handles JSON of any size — the only MCP JSON tool that does not crash on 100MB+ files. Returns the formatted result along with stats (node count, depth, size, parse time).

Compress/minify a JSON string to its smallest valid form (no whitespace).

Validate a JSON string. Returns whether it is valid, and if not, the exact error location (line and column). Also returns stats: node count, max depth, file size, parse time.

Search for keys, values, or paths inside a JSON structure. Returns matching nodes with their JSONPath locations. Supports key search (field name contains), value search (value string contains), and path search (JSONPath contains). Respects maxResults limit (default 50).

Query a JSON structure using JSONPath syntax. Supports dot-notation ($.store.book[0].title), recursive descent ($..author), array slicing ($[0:5]), wildcards ($..*), and filter expressions ($..book[?(@.price < 10)]). Returns matched values with their paths.

Deep compare two JSON strings and produce a structured diff report. Detects added keys, removed keys, changed values, and type changes. Returns a list of differences with their JSONPath locations and old/new values.

Convert JSON to another format: CSV, TSV, YAML, or TypeScript type definitions. CSV/TSV requires a top-level array of objects. YAML and TypeScript work on any structure.

Activate a ClearJSON Pro license key (CLJ-XXXX-XXXX-XXXX). Unlocks query_json, diff_json, and convert_json tools. One license covers up to 3 devices. $29 lifetime at wayknow.tech/clearjson.html.

Check ClearJSON Pro license status — activation state, email, device count, offline/online.

Remove the Pro license from this machine. Frees up a device slot.